Mon Prof Augmenté
High Tide on Both Sides
Age 11 · Physics
Earth and the Moon both orbit a point that sits between them. The Moon’s pull stretches Earth’s oceans, so the water rises on the side facing the Moon and also on the side facing away.
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Age 11: open this week
Browse Age 11
In the picture
- Earth: the whole planet, turning as it swings around the shared centre
- The Moon: it orbits the same centre and pulls hardest on the ocean nearest to it
- The water hump on the side facing away from the Moon: water piles up there too
- The mark at the shared centre: the point both bodies circle around
Examples
- Water climbs the walls of a bucket when you swing it round in a circle.
- A ball on a string: your hand and the ball both circle a point between them.
Key takeaways
- The Moon pulls hardest on the ocean closest to it, and the water rises there.
- Because Earth spins, most coasts get two high tides each day.
Quiz: High Tide on Both Sides (Age 11)
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Where does the Moon pull hardest on Earth’s oceans?
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What happens to the ocean on the side of Earth facing away from the Moon?
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Why do most coasts get two high tides each day?
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